Low-boiling-point gas sampling device

Abstract

The utility model provides a low-boiling-point gas sampling device. The low-boiling-point gas sampling device comprises an anti-explosion electric heat tracing gas guiding pipe, a box body and a sampling gas bag, the sampling air bag is arranged in the box body, the input end is provided with a first one-way valve, and the output end is provided with a second one-way valve; the flow direction of the first one-way valve faces the interior of the sampling air bag, and the flow direction of the second one-way valve faces the exterior of the sampling air bag; the explosion-proof electric heat tracing air entraining pipe penetrates through the box body, and the output end of the explosion-proof electric heat tracing air entraining pipe is communicated with the first one-way valve of the sampling air bag; the box body is provided with a heat preservation layer used for heat preservation of the interior of the box body. The box body comprises a box cover; the box cover is connected with the box body in a sealed mode. According to the low-boiling-point gas sampling device provided by the invention, the problem that the concentration of a target component of a sample is distorted due to the fact that gas is condensed on the inner wall of the sampling pipe can be solved.

Description

Technical Field

[0001] The present application relates to the field of gas sampling, and in particular to a low boiling point gas sampling device. Background Art

[0002] In production, R&D and quality inspection, gas sampling devices are usually used to sample gases. Gas sampling devices are professional equipment used to collect gas samples from a specific environment for subsequent gas composition analysis, concentration measurement, pollution monitoring, safety assessment and other work.

[0003] In actual operations, it is usually necessary to sample gases with low boiling points, easy liquefaction and high temperature sensitivity. In the prior art, when a gas sampling device samples gases with low boiling points, easy liquefaction and high temperature sensitivity, gas condenses on the inner wall of the sampling tube, causing distortion of the concentration of the target component in the sample. Utility Model Content

[0004] In response to the above problems, the present application provides a low-boiling point gas sampling device, which can solve the problem of gas condensation on the inner wall of the sampling tube, causing distortion of the concentration of the target component of the sample.

[0005] To achieve the purpose of this application, this application provides the following technical solutions:

[0006] The present application provides a low-boiling-point gas sampling device, comprising: an explosion-proof electric heating air duct, a box body, and a sampling air bag;

[0007] The sampling air bag is arranged inside the box, with a first one-way valve at the input end and a second one-way valve at the output end; the flow direction of the first one-way valve is toward the inside of the sampling air bag, and the flow direction of the second one-way valve is toward the outside of the sampling air bag;

[0008] The explosion-proof electric heating air duct is arranged in the box, and the output end is connected with the first one-way valve of the sampling air bag;

[0009] The box body has a heat-insulating layer for keeping the interior of the box body warm;

[0010] The box body comprises a box cover; the box cover is sealed and connected to the box body.

[0011] In a possible implementation, the low-boiling-point gas sampling device further includes: a heating plate for heating the interior of the box.

[0012] In a possible implementation, the contact surface between the box cover and the box body is provided with a sealing strip, and the sealing connection is fixed by a lock.

[0013] In a possible implementation, the side walls, top surface and bottom surface of the box body all have interlayers, and the thermal insulation layer is filled in the interlayers.

[0014] In a possible implementation, the low-boiling-point gas sampling device further includes: an air pump connected to the interior of the box body and used to adjust the air pressure inside the box body.

[0015] In a possible implementation, the low-boiling-point gas sampling device further includes: a temperature control module; the explosion-proof electric heating air duct and the heating plate are connected to the temperature control module for controlling the heating temperature of the explosion-proof electric heating air duct and the heating plate.

[0016] In a possible implementation, the low-boiling-point gas sampling device further includes: a battery; the battery is connected to the explosion-proof electric heating air duct, the heating plate and the air pump, and is used to supply power to the explosion-proof electric heating air duct, the heating plate and the air pump.

[0017] In a possible implementation, the low-boiling-point gas sampling device further includes: an air pump start-stop circuit;

[0018] The air pump start and stop circuit is used to control the start and stop of the air pump.

[0019] In a possible implementation, the low-boiling-point gas sampling device further includes: a pressure gauge for displaying the pressure inside the box.

[0020] In a possible implementation, one end of the explosion-proof electric heating air duct is provided with an air duct filter.

[0021] Beneficial effects:

[0022] The low-boiling-point gas sampling device provided in the present application can solve the problem of condensation of gas containing easily liquefied components on the inner wall of the sampling tube, causing distortion of the concentration of the target component of the sample, and can achieve insulation of cold or hot samples to meet the temperature requirements of sample analysis. For samples containing temperature-sensitive components, the stability of the sample components can be guaranteed.

[0023] Moreover, it is not limited by on-site working conditions and can be used for sampling in positive pressure and negative pressure pipelines. It is easy to operate and has adjustable temperature, which shortens the preheating time of the box before sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application.

[0025] Figure 1 A schematic structural diagram of a low-boiling-point gas sampling device provided in an embodiment of the present application.

[0026] Figure markings: 1-explosion-proof electric heating air duct; 2-box body, 21-box cover, 22-air inlet, 23-exhaust port, 24-lock, 25-insulation layer; 3-battery; 4-sampling air bag, 41-first one-way valve, 42-second one-way valve; 5-temperature control module; 6-heating plate; 7-pressure gauge; 8-air pump start and stop circuit; 9-air pump. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of this application, unless otherwise specified, "plurality" means two or more.

[0029] Example 1

[0030] Figure 1 A low-boiling-point gas sampling device provided in an embodiment of the present application comprises: an explosion-proof electric heating air duct 1, a box 2, and a sampling air bag 4;

[0031] The sampling air bag 4 is arranged inside the box 2, with a first one-way valve 41 at the input end and a second one-way valve 42 at the output end; the flow direction of the first one-way valve 41 is toward the inside of the sampling air bag 4, and the flow direction of the second one-way valve 42 is toward the outside of the sampling air bag 4;

[0032] The explosion-proof electric heating air duct 1 is disposed in the box 2, and the output end is connected to the first one-way valve 41 of the sampling air bag 4;

[0033] The box body 2 has a heat-insulating layer 26 for keeping the interior of the box body 2 warm;

[0034] The box body 2 includes a box cover 21 ; the box cover 21 is sealed and connected to the box body 2 .

[0035] Optionally, the thermal insulation layer 26 is aluminum foil pearl thermal insulation cotton.

[0036] Optionally, the thickness of the thermal insulation layer 26 is greater than 1 cm.

[0037] Optionally, the box cover 3 has an interlayer filled with a thermal insulation layer 26 , and the explosion-proof electric heating air duct 1 is a telescopic structure and is passed through the interlayer of the box cover 3 .

[0038] Optionally, the sampling air bag 4 is an aluminum foil air bag, and the first one-way valve 41 at the input end is connected to the explosion-proof electric heating air duct 1 through a silicone tube.

[0039] In a possible implementation manner, the low-boiling-point gas sampling device further includes: a heating plate 6 for heating the interior of the box 2 .

[0040] Optionally, the heating plate 6 is a 5V 10W graphene heating sheet, which is arranged at the bottom of the box 2.

[0041] In a possible implementation manner, the contact surfaces of the box cover 21 and the box body 2 are both provided with sealing strips, and are fixedly sealed and connected by a lock buckle 24 .

[0042] In a possible implementation manner, the side walls, top surface, and bottom surface of the box body 1 all have interlayers, and the thermal insulation layer 26 is filled in the interlayers.

[0043] In a possible implementation manner, the low-boiling-point gas sampling device further includes: an air pump 9 , which is connected to the interior of the box 2 and is used to adjust the air pressure inside the box 2 .

[0044] Optionally, the storage area of ​​the box body 2 is located below the box cover 3 and above the heating plate 6, and the storage area of ​​the box body 2 can achieve a negative pressure condition of 0.05 MPa and a temperature adjustment of 0-60 degrees Celsius.

[0045] In a possible embodiment, the low-boiling point gas sampling device further includes: a temperature control module 5; the explosion-proof electric heating air duct 1 and the heating plate 6 are connected to the temperature control module 5 for controlling the heating temperature of the explosion-proof electric heating air duct 1 and the heating plate 6.

[0046] Optionally, the temperature control module 5 controls the temperature of the heating plate 6 and the explosion-proof electric heating air duct 1 by controlling the power of the heating plate 6 and the explosion-proof electric heating air duct 1 .

[0047] In a possible embodiment, the low-boiling point gas sampling device further includes: a battery 3; the battery 3 is connected to the explosion-proof electric heating air duct 1, the heating plate 6 and the air pump 9, and is used to power the explosion-proof electric heating air duct 1, the heating plate 6 and the air pump 9.

[0048] In a possible implementation manner, the low-boiling-point gas sampling device further includes: an air pump start-stop circuit 8;

[0049] The air pump start-stop circuit 8 is used to control the start and stop of the air pump 9.

[0050] In a possible implementation manner, the low-boiling-point gas sampling device further includes: a pressure gauge 7 for displaying the pressure inside the box 2 .

[0051] In a possible implementation, one end of the explosion-proof electric heating air duct 1 is provided with an air duct filter.

[0052] Optionally, the air duct filter is a 0.45 micron hydrophobic filter for filtering impurities in the gas.

[0053] Working steps:

[0054] 1. Place the sampling air bag 4 into the box body 2, connect the first one-way valve 41 to the explosion-proof electric heating air duct 1, cover the box cover 21, and lock the lock 24.

[0055] 2. Adjust the temperature of the heating plate 6 and the explosion-proof heated air duct 10 through the temperature control module 5 and maintain it for 1-2 minutes.

[0056] 3. Insert the explosion-proof heating air duct 10 into the sampling pipeline, start the air pump 9 through the air pump start-stop circuit 8, observe the internal pressure of the box 2 through the pressure gauge 7, so that a specific negative pressure is formed in the box 2, and the gas sample in the sampling pipeline enters the sampling air bag 4, and the second one-way valve 42 at the output end of the sampling air bag 4 is in a closed state.

[0057] 4. After the sampling is completed, close the air pump 9 connected to the explosion-proof heating air duct 10, and retract the explosion-proof electric heating air duct 1 into the interlayer of the box cover 21.

[0058] 5. When analyzing the gas sample, open the second one-way valve 42 at the output end of the sampling gas bag 4 to pass the gas into the gas analysis device. At this time, the first one-way valve 41 at the output end is in a closed state. After the analysis is completed, turn off the heating plate 6 through the temperature control module 5.

[0059] 6. After multiple samplings, the battery 3 needs to be charged, and each charging takes two hours.

[0060] In the several embodiments provided in the present application, it should be understood that the disclosed systems, modules and methods can be implemented in other ways. For example, the module embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, modules or units, which can be electrical, mechanical or other forms.

[0061] The above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. The present application is not limited to the exact structure described above and illustrated in the accompanying drawings, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be deemed to belong to the protection scope of the present application.

Claims

1. A low boiling point gas sampling device, characterized in that: include: An explosion-proof electric heating air duct (1), a box (2), and a sampling air bag (4); The sampling air bag (4) is arranged inside the box (2), and has a first one-way valve (41) at the input end and a second one-way valve (42) at the output end; the flow direction of the first one-way valve (41) is toward the inside of the sampling air bag (4), and the flow direction of the second one-way valve (42) is toward the outside of the sampling air bag (4); The explosion-proof electric heating air duct (1) is passed through the box (2), and the output end is communicated with the first one-way valve (41) of the sampling air bag (4); The box body (2) has a heat-insulating layer (26) for keeping the interior of the box body (2) warm; The box body (2) comprises a box cover (21); the box cover (21) is sealedly connected to the box body (2).

2. The low boiling point gas sampling device according to claim 1, characterized in that: Also includes: A heating plate (6) is used to heat the interior of the box (2).

3. The low boiling point gas sampling device according to claim 1, characterized in that: The contact surfaces of the box cover (21) and the box body (2) are both provided with sealing strips and are fixedly sealed and connected via a lock buckle (24).

4. The low boiling point gas sampling device according to claim 1, characterized in that: The side walls, top surface and bottom surface of the box body (2) all have interlayers, and the thermal insulation layer (26) is filled in the interlayers.

5. The low boiling point gas sampling device according to claim 2, characterized in that: Also includes: An air pump (9) is connected to the interior of the box (2) and is used to adjust the air pressure inside the box (2).

6. The low boiling point gas sampling device according to claim 2, characterized in that: Also includes: Temperature control module (5); the explosion-proof electric heating air duct (1) and the heating plate (6) are connected to the temperature control module (5) and are used to control the heating temperature of the explosion-proof electric heating air duct (1) and the heating plate (6).

7. The low boiling point gas sampling device according to claim 5, characterized in that: Also includes: A battery (3); the battery (3) is connected to the explosion-proof electric heating air duct (1), the heating plate (6) and the air pump (9), and is used to supply power to the explosion-proof electric heating air duct (1), the heating plate (6) and the air pump (9).

8. The low boiling point gas sampling device according to claim 5, characterized in that: Also includes: Air pump start and stop circuit (8); The air pump start-stop circuit (8) is used to control the start and stop of the air pump (9).

9. The low boiling point gas sampling device according to claim 1, characterized in that: Also includes: A pressure gauge (7) is used to display the pressure inside the box (2).

10. The low boiling point gas sampling device according to claim 1, characterized in that: One end of the explosion-proof electric heating air duct (1) is provided with an air duct filter.

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